79806145 has 4 divisors (see below), whose sum is σ = 95767380. Its totient is φ = 63844912.

The previous prime is 79806119. The next prime is 79806149. The reversal of 79806145 is 54160897.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11512449 + 68293696 = 3393^2 + 8264^2 .

It is a cyclic number.

It is not a de Polignac number, because 79806145 - 2⁷ = 79806017 is a prime.

It is a super-2 number, since 2×79806145² = 12738041559522050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 79806098 and 79806107.

It is not an unprimeable number, because it can be changed into a prime (79806149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7980610 + ... + 7980619.

It is an arithmetic number, because the mean of its divisors is an integer number (23941845).

Almost surely, 2^79806145 is an apocalyptic number.

It is an amenable number.

79806145 is a deficient number, since it is larger than the sum of its proper divisors (15961235).

79806145 is a wasteful number, since it uses less digits than its factorization.

79806145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15961234.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 79806145 is about 8933.4285131745. The cubic root of 79806145 is about 430.5386165579.

The spelling of 79806145 in words is "seventy-nine million, eight hundred six thousand, one hundred forty-five".